Income Zombie

## Tier I ##
- [Google Adwords](http://adwords.com/)
- [Yahoo! Search Marketing (YSM)](http://marketingsolutions.login.yahoo.com/)
- [MSN AdCenter](http://adcenter.msn.com/)

## Tier II ##
- [Miva](http://miva.com)
- [Mirago (UK)](http://uk.mirago.com/)
- [Adbrite](http://adbrite.com/)
- [Kanoodle](http://kanoodle.com/)
- [Looksmart](http://looksmart.com/)
- [Search123](http://search123.com/)
- [Searchfeed](http://searchfeed.com/)
- [7search](http://7search.com)
- [ABCsearch](http://abcsearch.com)
- [GoClick](http://goclick.com/)
- [Findology](http://findology.com/)
- [Marchex AdHere](http://www.marchex.com/enhance-now-adhere/)
- [FindIt Quick](http://www.findit-quick.com/)

## Tier Dead ##
- EnHance (acquired by [Marchex Adhere](http://www.marchex.com/enhance-now-adhere/))
- Sprinks(Acquired by Google. Formerly for running ads on the About.com network, which you can now do in Adwords)